Tài liệu Process Systems Analysis And Control P2 pptx

... limitation for control system study because will represent the time variable and we shall be interested in the behavior of systems only for positive time. In fact, the variables and systems are ... by substitution into the differential equation and, as expected, are found to be -2 and respectively. Then x(t) = -2 + + + + and the constants and are determined by the three ini...

Ngày tải lên: 22/12/2013, 21:18

... Applications 18 Advanced Control Strategies 249 19 Controller Tuning and Process Identification 282 20 Control Valves 303 21 Theoretical Analysis of Complex Processes 318 . Part VI Sampled-Data Control Systems 22 Sampling ... Function Technique 506 Part IX Computers in Process Control 34 Digital Computer Simulation of Control Systems 35 Microprocessor-Based Controllers...

Ngày tải lên: 22/12/2013, 21:18

... independently, and the controller output has no effect. Suppose we set K * c to 1 and T I to 1 minute. Suppose the set point is 40% and the bias output 50%. Initially, there is no error, and so the controller ... Spring 2006 Process Dynamics, Operations, and Control 10.450 Lesson 5: Heated Tank • the controller output (between 0 and 100%) specifies the position of the...

Ngày tải lên: 16/02/2014, 19:20

... PM Coughanowr LeBlanc Third Edition Process Systems Analysis and Control Process Systems Analysis and Control Donald R. Coughanowr Steven E. LeBlanc Third Edition Process Systems Analysis and Control, Third Edition ... reaction, and process dynamics and control. Much of his research in control empha- sized the development and evaluation of new control...

Ngày tải lên: 01/04/2014, 11:12

... functions, PID control loops and optional programming commands. The processor consists of the microprocessor, system memory, serial communication ports for printer, PLC LAN link and external programming ... Programmable Controller Block Diagram The Central Processing Unit (CPU) is the control portion of the PLC. It interprets the program commands retrieved from memory and acts on th...

Ngày tải lên: 22/12/2013, 21:18

Ngày tải lên: 25/01/2014, 13:20

... B., Instrumentation and Control of Nuclear Reactors, ILIFFE Books Ltd., London. Wightman, E.J., Instrumentation in Process Control, CRC Press, Cleveland, Ohio. Rhodes, T.J. and Carroll, G.C., ... functions: indication, alarm, and control. The temperatures monitored may normally be displayed in a central location, such as a control room, and may have audible and visual alarms...

Ngày tải lên: 13/12/2013, 01:15

... silver. Copper and alu- minum are also excellent electrical conductors. Iron, steel, and various other metals are fair to good conductors of electricity. In most electrical circuits and systems, copper ... of juice,” and the supply of chemical energy must be restored by charging. Some cells and batteries, such as lead-acid car batteries, can be recharged by driving current through...

Ngày tải lên: 13/12/2013, 01:15

... H 2 (g). Any non-standard reversible hydrogen electrode with well-controlled H + activity and H 2 fugacity can also be used as a reference. The equilibrium potential (E eq ) of a nonstandard reversible ... secondary reference electrodes that are easier to construct and handle, less sensitive to impurities, and whose potential is very stable and well- known with respect to the SHE (...

Ngày tải lên: 13/12/2013, 04:15

... FINANCIAL SYSTEMS & ANALYSIS INVENTORY & CASH Example of control test • Cash Payments  Inspect current cheque books for  Sequential use of cheques  Controlled custody of ... temperature controls 2. Inventory rotated to ensure FIFO usage where relevance 3. Valuable inventories locked away and inventory areas limited to single exit (security) Process Risks Possible c...

Ngày tải lên: 22/12/2013, 15:15